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A Route to a Room Temperature, Effusive Atomic Beams

A Route to a Room Temperature, Effusive Atomic Beams. Morgan Welsh Miami University, NIST Summer Undergraduate Research Fellow. Abstract: Conventionally, effusive atomic beams of alkali metals are created using an oven that heats an atomic source

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A Route to a Room Temperature, Effusive Atomic Beams

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  1. A Route to a Room Temperature, Effusive Atomic Beams Morgan Welsh Miami University, NIST Summer Undergraduate Research Fellow Abstract: Conventionally, effusive atomic beams of alkali metals are created using an oven that heats an atomic source to create a non-directional atomic beam. The out-going atoms pass through a constriction that collimates the atoms into a narrow beam. A phenomenon, known as Light-Induced Atomic Desorption (LIAD), can be applied to this system to increase the density of rubidium atoms. LIAD is a non-thermal process using non-resonant, ultraviolet light incident on the inside surfaces of the chamber. The UV light modifies the surface properties and releases atoms that were bound to the surface. These desorbed atoms are at room temperature, and therefore have relatively low velocities, which facilitates more efficient laser cooling apparatus. I investigated the effects of LIAD on a rubidium vapor cell, and subsequently extended the experiment to detect a LIAD enhanced rubidium beam Wed. Sept. 7th

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